MCP2210 datasheet(53/82 Pages) MICROCHIP

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 2011 Microchip Technology Inc.

DS22288A-page 53

MCP2210

3.4

External Interrupt Pin (GP6) Event Status

The External Interrupt pin event status command is used by the USB host to query the external interrupt events recorded

by the MCP2210. In order to have the MCP2210 record the number of external interrupt events, GP6 must be configured

to have its dedicated function active.

3.4.1

GET (VM) THE CURRENT NUMBER OF EVENTS FROM THE INTERRUPT PIN

3.4.1.1

Responses

FIGURE 3-22:

GET (VM) THE CURRENT NUMBER OF EVENTS FROM THE INTERRUPT PIN

LOGIC FLOW

TABLE 3-56:

COMMAND STRUCTURE

Byte

Index

Meaning

00x12 – Get (VM) the Current Number of Events From the Interrupt Pin

Reset or Not the Event Counter

• 0x00 – reads, then resets the event counter

• Any other value – the event counter is read, however, the counter is not reset

2-63

0x00 - Reserved

TABLE 3-57:

RESPONSE 1 STRUCTURE

Byte

Index

Meaning

0x12 – Get (VM) the Current Number of Events from the Interrupt Pin – echos back the given

command code

0x00 – Command Completed Successfully

Don’t Care

Interrupt Event Counter – 16-bit value (low byte)

Interrupt Event Counter – 16-bit value (high byte)

63-63

Don’t Care

Get External

Interrupt Pin Events

Counter

Response 1

External Interrupt

Pin Event Counter

Value Retrieved

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